protected DbUser initUser() {
   return getSessionDataContainer().getUser(engineContext.getSessionId(), parameters.getRefresh());
 }
 protected long getEngineSessionSeqId() {
   if (engineContext.getSessionId() == null) {
     throw new RuntimeException("No sessionId found for query " + getClass().getName());
   }
   return getSessionDataContainer().getEngineSessionSeqId(engineContext.getSessionId());
 }